Update Dockerfile

Author: xrain0610

Dockerfile

@@ -3,7 +3,7 @@ LABEL maintainer="[email protected]"
 # webproc release settings
 ENV WEBPROC_VERSION 0.2.2
 ENV WEBPROC_URL https://github.com/jpillora/webproc/releases/download/$WEBPROC_VERSION/webproc_linux_amd64.gz
-ENV CADDY_VERSION 0.11.1
+ENV CADDY_VERSION 2.1.1
 ENV CADDY_URL https://github.com/mholt/caddy/releases/download/v${CADDY_VERSION}/caddy_v${CADDY_VERSION}_linux_amd64.tar.gz
 # fetch caddy and webproc binary (rely on ca root certs signing github.com for security)
 RUN set -e && set -x